If you’re good at design, I would suggest creating your own web page to display your fonts, as Pia Frauss has done, or as I have done My Fonts
If you’re more concerned with generating income then I suppose the best approach would be to submit your font to one of the many well-known font sites. I don’t know which is best, as its not something I have tried. My fonts are released under GNU license so I don’t need to advertise them. I just add a link to my signature on various forums, and sometimes I post a thread about them where there might be people interested in fonts. If they are commercial fonts, be careful to avoid spamming forums.
There is also a Gallery Forum here, where you can display your designs, and link to your site.